I've done a few lagers, some with better success than others. In fact, my second Braumeister brew, which I brewed last week, is a lager. The hardest part of brewing a lager (besides temperature control) is the yeast starter. A decent starter is usually pretty important. My problem is that I'm lazy and not very good at planning ahead. Anyway, I'd recommend Wyeast 2124 Bohemian Lager yeast if you're at all like me. It's incredibly forgiving.